Ho fapana le mekhoa ea ho tlosa thepa, extrusion ea aluminium ke mokhoa oa ho etsa.Ka extrusion, aluminium e tala e qala ho futhumatsoa ebe e bōptjoa hore e be karolo e hlokehang ho sebelisoa pheleu ho e sutumetsa ka har'a lefi.Aluminium extrusion e sebelisa li-stocks tse pota-potileng tsa aluminium kapa alloy alloy, tse bitsoang "billets", ho hlahisa likarolo tse nang le li-profiles le libopeho tse tsitsitseng.
Haholo-holo, ts'ebetso ea aluminium extrusion e hloka feela sebōpi le mochine oa khatiso o nang le lefu.Bakeng sa extrusion, billet e qala ho futhumatsoa mocheso o phahameng ho etsa hore e be ductile haholoanyane.Thempereichara e ka 'na ea e-ba haufi le mocheso oa kamore kapa e phahame joaloka mocheso oa recrystallization.Ho itšetlehile ka mocheso ona, mokhoa ona o bitsoa extrusion e batang, e futhumetseng kapa e chesang.